Description: No information was found
on this particular species. However, a close relative, O. chacei,
also known as O. wroblewskyi, is only differentiated from O.
montereyensis by the number of axial ribs. The chacei species
usually has 7 ribs, while O. montereyensis
has 8-10 axial ribs.
O.
chacei has a shell up to 30 mm high with the base delimited by a low
spiral cord or keel. The axial ribs are broadly rounded. The
shell color is white or cream.